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It is very difficult for me to choose a groupset for my new frame. I'm choosing between Campagnolo Super-Record and Sram Red. Both are 2012 year.I'm interested in that which group is shifting better, faster and which is lighter.

Only one of those can be measured objectively, and that is weight. SRAM Red should be lighter by a small margin. Both groups function incredibly well, and neither is truly better than the other. The real question should be which one do you want?

SR is better looking, has better components, and the best and most durable ceramic bearings, is better made, and will last longer, and has a longer gurantee, plus you can shift up, and down five, with one stroke. Check out 'Competitive cyclist reviews Campy 11 speed' on youtube.